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dc.contributor.authorFuchs, C.
dc.contributor.authorSchwab, T.
dc.contributor.authorWieczorek, M.
dc.contributor.authorGather, M.C.
dc.contributor.authorHofmann, S.
dc.contributor.authorLeo, K.
dc.contributor.authorScholz, R.
dc.contributor.editorSo, F.
dc.date.accessioned2015-03-03T12:01:02Z
dc.date.available2015-03-03T12:01:02Z
dc.date.issued2014
dc.identifier172276634
dc.identifierbb278344-8ed1-4124-b8a0-e7b257fdbd8e
dc.identifier84922765275
dc.identifier.citationFuchs , C , Schwab , T , Wieczorek , M , Gather , M C , Hofmann , S , Leo , K & Scholz , R 2014 , Surface plasmon polariton modification in top-emitting organic light-emitting diodes for enhanced light outcoupling . in F So (ed.) , Organic Light Emitting Materials and Devices XVIII . vol. 9183 , Proceedings of SPIE , vol. 9183 , SPIE , Organic Light Emitting Materials and Devices XVIII , San Diego , United Kingdom , 17/08/14 . https://doi.org/10.1117/12.2061585en
dc.identifier.citationconferenceen
dc.identifier.isbn9781628412109
dc.identifier.issn0277-786X
dc.identifier.otherORCID: /0000-0002-4857-5562/work/47136460
dc.identifier.urihttps://hdl.handle.net/10023/6158
dc.description.abstractWe report on the enhanced light outcoupling efficiency of monochrome top-emitting organic light-emitting diodes (OLEDs). These OLEDs incorporate a hole transport layer (HTL) material with a substantially lower refractive index (∼ 1:5) than the emitter material or the standard HTL material (∼ 1:8) of a reference device. This low-index HTL is situated between the opaque bottom metal contact (anode) and the active emission layer. Compared to an HTL with common refractive index, the dispersion relation of the surface plasmon polariton (SPP) mode from the opaque metal contact is shifted to smaller in-plane wavenumbers. This shift enhances the outcoupling efficiency as it reduces the total dissipated power of the emitter. Furthermore, the excitation of the coupled SPPs at the thin transparent metal top contact (cathode) is avoided by using an ultrathin top electrode. Hence, the coupling of the electroluminescence from the emitter molecules to all non-radiative evanescent modes, with respect to the emitter material, is reduced by at least a factor of two, additionally increasing the outcoupling efficiency. Furthermore, for sufficiently high refractive index contrast the shift of the SPP at the anode/organic interface can lead to in-plane wavenumbers smaller than the wavenumber within the organic emitter layer and outcoupling of all excited modes by high index light extraction structures, e.g. microlens, seems feasible. In accordance to optical simulations, the external quantum efficiency is enhanced by about 20% for monochrome green emitting OLEDs with low refractive index HTL compared to a reference sample.
dc.format.extent893456
dc.language.isoeng
dc.publisherSPIE
dc.relation.ispartofOrganic Light Emitting Materials and Devices XVIIIen
dc.relation.ispartofseriesProceedings of SPIEen
dc.subjectQC Physicsen
dc.subject.lccQCen
dc.titleSurface plasmon polariton modification in top-emitting organic light-emitting diodes for enhanced light outcouplingen
dc.typeConference itemen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.identifier.doi10.1117/12.2061585


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